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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63b5c722db2f39dda1bbba66f177a8b9a4747ae7eeb4d05e6b04959802d64cb9' 
  AND token = 'AQOJKO8hE9hR0a4+5Ei4m1LqSgwH+PsCCIEERO8/f7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}